Thread: OM-D E-M5 Auto ISO: Shutter speed setting?

That does make sense, but things like IBIS can really mess up the equation.

One thing I really enjoy on my D5100 is to use auto ISO with M mode. Then I control the shutter speed and aperture and the camera picks an ISO to get a good exposure. I can't use exposure compensation that way, but I guess you can't have everything.
Not sure if the Olympus allows something similar.

Originally Posted by BigTam

It's about avoiding too low shutter speeds automatically. If the camera (or your setting for the D7000) decides the shutter speed is too low and will cause blurring, it uses Auto-ISO to up the ISO and increase the shutter speed. What constitutes 'too low' is dependant on focal length. A 200mm lens needs a faster shutter speed to avoid blur than a wide-angle

I see. I did vaguely wonder if that was why.
Not something I feel the need for.

The Olympus M 4/3 cameras in general have always been very good about Auto ISO, both in terms of default settings (basing shutter speed/ISO on focal length of lens), and customization (you can choose a faster minimum shutter speed.) It's not going to allow you to create a 2x2 table of shutter speed/ ISO combinations or anything, but that shouldn't be necessary. Pick the minimum shutter speed you would like in the settings, and the camera will do its best (up to maximum ISO) to not go slower than that.

Originally Posted by BigTam

It's about avoiding too low shutter speeds automatically. If the camera (or your setting for the D7000) decides the shutter speed is too low and will cause blurring, it uses Auto-ISO to up the ISO and increase the shutter speed. What constitutes 'too low' is dependant on focal length. A 200mm lens needs a faster shutter speed to avoid blur than a wide-angle

There is a much better method to achieve what you want. All Olympus can be set to enable Auto-ISO in M mode. So just set the shutter speed to the minimal shutter speed you need to prevent blurring and close the aperture as much as it is necessary to get the depth of field you need. If Auto-ISO is enabled, you will get the lowest possible ISO.

Originally Posted by Chris2500dk

One thing I really enjoy on my D5100 is to use auto ISO with M mode. ...
Not sure if the Olympus allows something similar.

Yes, it does, but it has to be enabled.

I'm still missing where you can set the minimum shutter speed ...

It's "Slow Limit" in the Custom Flash settings (Cogs-F).

See this thread at dpreview. I tried it with my E-P2 and it works, although unfortunately the formula is not

min{1/35eq_focal_length,slow_limit_value}

but instead

max{1/35eq_focal_length,slow_limit_value}

Thus you can raise the minimum required speed above the inverse of the focal length (35mm equivalent), but you can't lower it. If I set "Slow Limit" to it's minimum value (1/30s), I still get a crossover speed of 1/100s for the 45/1.8, and that regardless of IBIS. If I set "Slow Limit" to 1/160s, it uses 1/160s as crossover speed.

Originally Posted by amanessinger

It's "Slow Limit" in the Custom Flash settings (Cogs-F).

Thank you! I'm assuming this applies even when flash is not used? Not very intuitive :-)